libata: align ap->sector_buf

htejun · Jeff Garzik · commit 84bda12af31f · 2009-03-05T07:25:02.000-05:00
ap-&gt;sector_buf is used as DMA target and should at least be aligned on
cacheline.  This caused problems on some embedded machines.

Signed-off-by: Tejun Heo &lt;tj@kernel.org&gt;
Signed-off-by: Jeff Garzik &lt;jgarzik@redhat.com&gt;
diff --git a/include/linux/libata.h b/include/linux/libata.h
@@ -751,7 +751,8 @@ struct ata_port {
 	acpi_handle		acpi_handle;
 	struct ata_acpi_gtm	__acpi_init_gtm; /* use ata_acpi_init_gtm() */
 #endif
-	u8			sector_buf[ATA_SECT_SIZE]; /* owned by EH */
+	/* owned by EH */
+	u8			sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
 };
 
 /* The following initializer overrides a method to NULL whether one of
